Add constant color GrFP.

gyp/gmslides.gypi

 # Copyright 2015 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 # include this gypi to include all the golden master slides.
 {
   'include_dirs': [
     '../gm',
     # include dirs needed by particular GMs
     '../src/utils/debugger',
@@ skipping 47 matching lines @@
         '../gm/colormatrix.cpp',
         '../gm/colortype.cpp',
         '../gm/colortypexfermode.cpp',
         '../gm/colorwheel.cpp',
         '../gm/concavepaths.cpp',
         '../gm/complexclip.cpp',
         '../gm/complexclip2.cpp',
         '../gm/complexclip3.cpp',
         '../gm/composeshader.cpp',
         '../gm/conicpaths.cpp',
+        '../gm/constcolorprocessor.cpp',
         '../gm/convexpaths.cpp',
         '../gm/convexpolyclip.cpp',
         '../gm/convexpolyeffect.cpp',
         '../gm/copyTo4444.cpp',
         '../gm/cubicpaths.cpp',
         '../gm/cmykjpeg.cpp',
         '../gm/dstreadshuffle.cpp',
         '../gm/degeneratesegments.cpp',
         '../gm/dcshader.cpp',
         '../gm/discard.cpp',
@@ skipping 184 matching lines @@
         '../gm/shadertext2.cpp',
         '../gm/shadertext3.cpp',
 
         # TODO(reed): Allocates more memory than Android devices are capable of
         # fulfilling. See http://skbug.com/1978
         '../gm/verylargebitmap.cpp',
       ],
     }],
   ],
 }